ACCESSORIES MLC300 SERVICE/MAINTENANCE MANUAL
10-22
Published 11-22-17, Control # 257-02
BOOM BUTT PIN PULLERS
General
This part of Section 10 provides operational information and
electrical and hydraulic schematics for the boom butt pin
pullers system.
Additional component information for this system can be
found in the following sections of the Service Manual:
• Section 2: Hydraulics
• Section 3: Electrical
The pins that connect the boom butt to the rotating bed are
controlled by the setup remote.
See Figure 10-16
and Figure 10-17 for the following
descriptions.
Setup Remote Control
The setup remote control communicates with the CCM-10
control module via the controller area network bus (CAN
Bus). The crane control modules use the CAN Bus to
communicate with each other.
To operate the setup remote, it must be turned on as
instructed in the MLC300 Operator Manual.
The mast must be configured for setup by using the RCL/RCI
display. For setup instructions, see the RCL/RCI display
operation manual (F2269).
Neutral
When there is no command from the setup remote:
• Pump 3 hydraulic flow through system B (right valve
assembly) decreases.
• The isolation valve B shifts to neutral to block pump
hydraulic flow to the boom butt pin puller valve.
• The boom butt pin puller valve shifts to neutral to block
hydraulic flow to the boom butt pin pullers.
Disengage (extend)
When a pin puller engage command is initiated by the setup
remote, the setup remote receiver sends the command to
CCM-10 control module. The CCM-10 control module then
communicates the extend command to the CCMC11 and
IOLC30 control modules via CAN Bus C.
The following then occurs:
• The CCM-10 control module increases the PWM current
to pump 3 to increase system B (right valve assembly)
hydraulic flow.
• The IOLC30 control module sends 24 V
DC
to the side B
solenoid on isolation valve B. The solenoid energizes
because the CCMC11 control module provides a ground
for the solenoid. The energized solenoid shifts the valve
spool to a position that routes hydraulic fluid to the boom
butt pin puller valve.
• The CCMC11 control module then sends 24 V
DC
to the
corresponding solenoid on the boom butt pin puller
valve, energizing the solenoid. The valve shifts to a
position that routes hydraulic fluid to the barrel end of the
pin puller cylinders.
• Hydraulic fluid flows into the barrel end of the pin puller
cylinders and the rods extend to disengage the boom
butt pins. This action forces hydraulic fluid out the rod
end of the pin puller cylinders and back to the tank via
the boom butt pin puller valve.
Engage (retract)
When a pin puller disengage command is initiated by the
setup remote, the setup remote receiver sends the
command to CCM-10 control module. The CCM-10 control
module then communicates the extend command to the
CCMC11 and IOLC30 control modules via CAN Bus C.
The following then occurs:
• The CCM-10 control module increases the PWM current
to pump 3 to increase system B (right valve assembly)
hydraulic flow.
• The IOLC30 control module sends 24 V
DC
to the side B
solenoid on isolation valve B. The solenoid energizes
because the CCMC11 control module provides a ground
for the solenoid. The energized solenoid shifts the valve
spool to a position that routes hydraulic fluid to the boom
butt pin puller valve.
• The CCMC11 control module then sends 24 V
DC
to the
corresponding solenoid on the boom butt pin puller
valve, energizing the solenoid. The valve shifts to a
position that routes hydraulic fluid to the rod end of the
pin puller cylinders.
• Hydraulic fluid flows into the rod end of the pin puller
cylinders, and the rods retract to engage the boom butt
pins. This action forces hydraulic fluid out the barrel end
of the pin puller cylinders and back to the tank via the
boom butt pin puller valve.
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